George hatter chubb and harry withers chubb



Gr. H. 8v H. W. OHUBB.

COMBINED LATCH AND LOGK.

Patented Sept. ZZ, 1885.

(No Model.)

'lu/llll/11117111111111111111 E. W il/ NrTED STATES GEORGE HAYTERA OHUBB AND HARRY VITHERS CHUBB, OF LONDON,

ENGLAND.

COMBINED LATCH AND LOCK.

SPECIFICATION forming part of Letters Patent No. 326,626, dated September 22, 1885.

Application lled October 1, 1F81.

To all whom t may con/cern.-

Be it known that we, GEORGE HAYTEE CHUBB and HARRY WITHERS CHUBB, subjects ofthe Queen of Great Britain, residing at 12S Queen Victoria street, in the city of London, England, have invented certain new and useful Improvements in Combined Latches and Locks, (for which we have applied for Letters Patent in Great Britain, No. 7,610, dated May 12, 1884,) of which the follow'- ing is a specification.

In a latch-lock for doors provided with the ordinary spring-actuated sliding bolt having a beveled or inclined end, so that it may be forced inward at thc time when the door is being closed by this inclined end coming against the edge of the striking-plate,considerable resistance is offered tothe forcing back of the bolt, owing to the friction between the end of the bolt and the striking-plate and between the bolt and casing of the lock. To remedy this, we so make a spring-actuated bolt of'a latch-lock that it may be retracted by being turned inward about a fulcrum at either side, in order that when pressureis applied to either one or other side of that end of it which protrudes from the lock-case it will turn inward around the point where that side of the bolt passes into the case.

In accordance with our invention the bolt is yieldingl y pressed outward by the end of' a rod which we make to bear against the back of the bolt midway between its two opposite fulcrums or centers of movement and somewhat in advance of the1n,which rod is pressed forward by a spiral or other spring. The end of the rod may be jointed to the bolt by a pinjoint, or it may simply bear against it. rIwo separate springs might be used, one to bring back the bolt when turned in one direction, the other to bring back the bolt when turned in the opposite direction. Ve, however, prefer to employ a single rod, as above described. Preferably we provide the two fulcrums by making the bolt with shoulders on either side of it to come behind the end plate of the lock through which the bolt protrudes. Thelockplate bearings for these shoulders then serve as the fulcra for the bolt to turn upon when turned inward, as above described.

Io lock the bolt when shot,we employ a le- (No model.) Patented in England May ll, [884, No. 7,610.

ver or other spring-catch, which,unless withdrawn, prevents the bolt from being pressed back or from turning in the direction in which it would have to turn to allow of the door being opened, but which does not prevent the bolt from turning in the opposite direction, so that the door may at any time be closed by pushing it to.

The springcatch to lock the bolt and prevent it from turning may be applied in a variety of ways,and a variety of means may be adopted for withdrawing the catch Whenever it is required to open the door. Vhen the catch has been withdrawn, .the door can be opened with a very slight push or pull.

In the drawings hereunto annexed we have shown examples of' latch-locks constructed as above described. In the lock shown at Figures 1, 2, 3, and 4 the spring-catch used for locking the latch-bolt is worked by a pushand-pull action. In the lock shown at Figs. 5 and 6v it is worked by turning the handle, and in the lock shown at Fig. 7 it is worked by drawing the handle back.

Fig. 1 is a face view of the lock with the cover-plate removed; Fig. 2, an edge view, partly in section, showing the latch-bolt protruding from the end of the case and locked by the spring-catch. Fig. 3 is a similar vlew showing the spring-catch moved out of the Way of the latch-bolt, and the latch turned inward, as it would be by the striking-plate if the door by which the lock was carried were then pushed or pulled in the direction of the arrow to open the door. Fig. 4L is a similar view showing the latch-bolt turned inward in the opposite direction, as it would be when brought'against the striking-plate in closing the door. Fig. 5 is a face view with the cover-plateremoved, and Fig. 6 an edge view in section of the lock in which the spring-catch is worked by turning the handle. Fig. 7 is a face view, with the cover-plate removed, of another lock in which the drawing back of the handle is'made to act on the spring-catch; and Fig. S is a sectional view of the same.

Each ofthe locks shown in the drawings is provided, as is usual, with a lock-bolt, to be shot by a key; but if desired the latch-lock might be used alone without such key-lock.

In Figs. 1, 2, 3, and 4, A is the lock-case.

IOO

B is the latch-bolt, formed with a recess at the back, and shoulders B' at its opposite sides, at its inner end or base, which have fulerumbcarings against the back of the front end plate of the lock, through which the bolt protrudes. C is a rod pressed forward into this recess by a coiled spring which surrounds it, and which serves to press forward the latchbolt and normally keep its shoulders B' bearing against the back of the end plate. The forward end of the spring bears against a shoulder near the head of the rod, while its rear end bears aga-inst astnmp, A', through which the rear end of the rod passes. D is a circular rod, which passes through the stump A and through the rear end of the lock-case. At its front end it hasa springcatch, E, protruding sidewise from it. The end of this catch comes behind one of the shoulders B of the bolt B, to prevent this side of the bolt from being turned or pressed back inward into the case. At its rear end it has a short arm, D', projecting upward from it, which is kept bearing constantly against a collar, F, on the lock-spindle by a coiled spring, G, one end of which is secured to the loek-case and .the other to the rod.

Vhen the lock-spindle is moved in the diree-tion of the arrow in Fig. 3, by a push or pull upon oneA or other of the knobs which are, as usual, secured to its ends the rod D is turned upon its axis, and the catch E is thereby moved away from the shoulder B at the base or back end of the latch-bolt. By continuing the push or pull upon the knob, so as to move the door itself in the direction .of the arrow, the bolt B is made to bear against the striking-plate, and is thereby turnedinto the position shown at Fig. 3, and no longer oiiers any impediment to the door being opened. So soon as the door is opened the bolt is pressed back by the action of the spring C into the position shown at Fig. 2. When the door is moved in the opposite direction to close it -and the bolt is again brought against the striking-plate, the bolt turns into the position shown in Fig. 4, and

allows the door to close, and so soon as it has fully closed the bolt springs back to its former position and retains the door securely until one or other of the knobs is again pushed or pulled in the direction of the arrow in Fig. 3.

In Figs. 5 and 6 the parts, which are similar to those shown at Figs. 1, 2, 3, and 4, are marked with the same letters of reference, and the lock only differs from the lock shown in these gures in that the arm D', at the rear end of the rod D, enters a slot in the end of an arm projecting from the lock-spindle, so that the rod D has a partial turn given to it whenever theknob is turned.

In Fig. 7 the parts are also marked with the same letters of reference. The stop or catch :is drawn away from the shoulder B by drawing back the handle. The handle as it is drawn back turns a lever, H, and the lever turns the rod D, and so withdraws thestop or catch E.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is- 1. The combination of the lock-case, the spring-actuated turning-bolt, and the two fulcrums, one at each side of the bolt, about either of which the bolt may turn inward' as it is retracted and forced away from the other, substantially as and for the purpose set forth.

2. The combination of the lock-case, the spring-actuated turning-bolt, two fulcrums, one at each side of the bolt, about either of which the bolt may be allowed vto turn inward as it is retracted and forced away from the other, the spring-catch acting on the bolt,

and the lock-spindle, by connection with which the spring-catch is operated, substantiallyy as and for the purpose set forth.

GEORGE HAYTER CHUBB. HARRY WITHERS CHUBB.`

Vitnesses:

JNo. DEAN, WALTER I. S. RERTEN,

Both of 17 'Gracechurch St., London. 

